【正文】 ...................................................................................................................................... 13 等長(zhǎng)規(guī)則 ............................................................................................................................................................................. 14 最大過(guò)孔數(shù)目規(guī)則 ............................................................................................................................................................ 14 拓?fù)湟?guī)則 ............................................................................................................................................................................. 14 其他設(shè)置 ............................................................................................................................................................................. 15 8 安規(guī)、 EMC ................................................................................................................................................................................ 16 PCB 板接口電源的 EMC 設(shè)計(jì) ........................................................................................................................................ 16 板內(nèi)模擬電源的設(shè)計(jì) ........................................................................................................................................................ 16 關(guān)鍵芯片的電源設(shè)計(jì) ........................................................................................................................................................ 17 普通電路布局 EMC 設(shè)計(jì)要求 ......................................................................................................................................... 17 接口電路的 EMC 設(shè)計(jì)要求 ............................................................................................................................................. 17 時(shí)鐘電路的 EMC 設(shè)計(jì)要求 ............................................................................................................................................. 17 其他特殊電路的 EMC 設(shè)計(jì)要求 .................................................................................................................................... 18 其他 EMC 設(shè)計(jì)要求 ......................................................................................................................................................... 18 9 DFX設(shè)計(jì) .................................................................................................................................................................................... 19 空焊盤（ DUMMY PAD） .................................................................................................................................................... 19 0402 阻容器件的應(yīng)用條件 ............................................................................................................................................... 19 10 孔（結(jié)構(gòu)） ............................................................................................................................................................................. 20 孔的分類 ............................................................................................................................................................................. 20 支撐孔（ SUPPORTED HOLES） ......................................................................................................................................... 20 安裝孔設(shè)計(jì)要求 ................................................................................................................................................................ 20 工藝定位孔設(shè)計(jì)要求 ........................................................................................................................................................ 21 非支撐孔（ UNSUPPORTED HOLES） ................................................................................................................................ 22 過(guò)孔設(shè)計(jì)要求 .................................................................................................................................................................... 24 常用過(guò)孔的選用要求 ............................................................................................................................................... 25 11 印制線路板疊層設(shè)計(jì) ............................................................................................................................................................ 27 板材的類型 ......................................................................................................................................................................... 27 板材的使用方法 ................................................................................................................................................................ 27 線路板加工主要用層說(shuō)明 ................................................................................................................................................ 27 線路板疊層結(jié)構(gòu)設(shè)計(jì)方法 ................................................................................................................................................ 28 信號(hào)層設(shè)計(jì)要求 ....................................................................................................................................................... 28 平面層設(shè)計(jì)要求 ....................................................................................................................................................... 28 阻抗控制 ............................................................................................................................................................................. 29 12 格點(diǎn) ......................................................................................................................................................................................... 31 格點(diǎn)的作用 .................................................................................................................